公开(公告)号：EP4243477A2

公开(公告)日：2023-09-13

申请号：EP23188575.7

申请日：2014-05-23

申请人： Nippon Telegraph And Telephone Corporation

发明人： FUKUZONO, Hayato ,  MURAKAMI, Tomoki ,  KUDO, Riichi ,  SHINOHARA, Shoko ,  TAKATORI, Yasushi ,  MIZOGUCHI, Masato

IPC分类号： H04W16/28

摘要： A wireless communication apparatus includes a designation unit which generates format designation information for designating a format of transmission and reception for another wireless communication apparatus, a first transmission unit which wirelessly transmits the format designation information to the other wireless communication apparatus, an acquisition unit which acquires a packet, a propagation channel estimation unit which estimates uplink propagation channel information indicating a propagation channel from the other wireless communication apparatus to the wireless communication apparatus based on the packet, a calibration coefficient calculation unit which calculates a calibration coefficient based on downlink propagation channel information indicating a propagation channel from the wireless communication apparatus to the other wireless communication apparatus and the uplink propagation channel information, a transmission weight value calculation unit which calculates a transmission weight value based on the calibration coefficient and the uplink propagation channel information, and a second transmission unit which wirelessly transmits a predetermined signal to the other wireless communication apparatus based on the transmission weight value.

公开(公告)号：EP3264805A1

公开(公告)日：2018-01-03

申请号：EP16755468.2

申请日：2016-02-23

申请人： Nippon Telegraph and Telephone Corporation

发明人： KUDO, Riichi ,  ABEYSEKERA, Hirantha Sithira ,  TAKATORI, Yasushi ,  ICHIKAWA, Takeo ,  MIZOGUCHI, Masato ,  MORIOKA, Yasufumi ,  YASUDA, Hiroto ,  YAMADA, Akira ,  MORIHIRO, Yoshifumi ,  OKUMURA, Yukihiko

IPC分类号： H04W4/00 ,  H04W16/14 ,  H04W72/04 ,  H04W84/12 ,  H04W92/20

CPC分类号： H04W74/0833 ,  H04W4/00 ,  H04W16/14 ,  H04W72/04 ,  H04W72/0406 ,  H04W72/044 ,  H04W84/12 ,  H04W92/20

摘要： A wireless user equipment performing wireless communication in a primary and a secondary frequency bands, a first wireless access point AP performing the wireless communication in the primary frequency band, and a second wireless base transceiver station BTS performing the wireless communication in the secondary frequency band are included. The AP and the BTS are connected to each other through a network. A UD report transfer unit transfers a UD report including information relating to transmission-waiting user data destined for a receiving node. The receiving node includes a transmission opportunity control unit which sets a fixed transmission prohibition time in a channel in the primary frequency band for a wireless communication device in a vicinity, obtains a transmission opportunity, grants the transmission opportunity to the transmitting node, and causes the user data to be transmitted from the transmitting node according to the transferred UD report.

摘要翻译： 在主频带和次频带中执行无线通信的无线用户设备，在主频带中执行无线通信的第一无线接入点AP以及在次频带中执行无线通信的第二无线基站收发器BTS是 包括在内。 AP和BTS通过网络相互连接。 UD报告传送单元传送包括与指定给接收节点的发送等待用户数据有关的信息的UD报告。 接收节点包括传输机会控制单元，该传输机会控制单元在用于附近的无线通信设备的主频带的信道中设置固定的传输禁止时间，获得传输机会，将传输机会授予发送节点， 根据传送的UD报告从发送节点发送的用户数据。

公开(公告)号：EP4243477A3

公开(公告)日：2023-12-20

申请号：EP23188575.7

申请日：2014-05-23

申请人： Nippon Telegraph And Telephone Corporation

发明人： FUKUZONO, Hayato ,  MURAKAMI, Tomoki ,  KUDO, Riichi ,  SHINOHARA, Shoko ,  TAKATORI, Yasushi ,  MIZOGUCHI, Masato

IPC分类号： H04W16/28 ,  H04L25/02 ,  H04B7/0417 ,  H04B7/06

摘要： A wireless communication apparatus includes a designation unit which generates format designation information for designating a format of transmission and reception for another wireless communication apparatus, a first transmission unit which wirelessly transmits the format designation information to the other wireless communication apparatus, an acquisition unit which acquires a packet, a propagation channel estimation unit which estimates uplink propagation channel information indicating a propagation channel from the other wireless communication apparatus to the wireless communication apparatus based on the packet, a calibration coefficient calculation unit which calculates a calibration coefficient based on downlink propagation channel information indicating a propagation channel from the wireless communication apparatus to the other wireless communication apparatus and the uplink propagation channel information, a transmission weight value calculation unit which calculates a transmission weight value based on the calibration coefficient and the uplink propagation channel information, and a second transmission unit which wirelessly transmits a predetermined signal to the other wireless communication apparatus based on the transmission weight value.

公开(公告)号：EP3340719A1

公开(公告)日：2018-06-27

申请号：EP16839136.5

申请日：2016-08-15

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO, Riichi ,  ABEYSEKERA, Hirantha Sithira ,  MATSUI, Munehiro ,  ICHIKAWA, Takeo ,  TAKATORI, Yasushi ,  MIZOGUCHI, Masato

IPC分类号： H04W72/12 ,  H04W28/14 ,  H04W74/00 ,  H04W84/12

摘要： Provided is a wireless communication system which performs downlink data transmission based on a transmission opportunity acquired by a wireless access point (hereinafter referred to as TXOP access) or a transmission opportunity acquired by a wireless station and granted to the wireless access point (hereinafter referred to as RXOP access), when performing the downlink data transmission from the wireless access point to the wireless station based on a random access scheme, in which the wireless access point includes a control unit performing, on a transmission buffer which sequentially stores data frames to be transmitted for each of wireless stations, processing which lowers an order of priority of the data frames which are to be destined for the wireless station A by the TXOP access at the transmission buffer according to a transmission status of the data frames destined for a wireless station A by the RXOP access.

公开(公告)号：EP2434665A1

公开(公告)日：2012-03-28

申请号：EP10777559.5

申请日：2010-05-18

申请人： Nippon Telegraph And Telephone Corporation

发明人： ISHIHARA, Koichi ,  KOBAYASHI, Takayuki ,  KUDO, Riichi ,  TAKATORI, Yasushi ,  MATSUI, Munehiro ,  MIZOGUCHI, Masato ,  SANO, Akihide ,  YAMANAKA, Shogo ,  YAMAZAKI, Etsushi ,  MIYAMOTO, Yutaka ,  YOSHIDA, Eiji ,  NAKAGAWA, Tadao

IPC分类号： H04B10/04 ,  H04B10/02 ,  H04B10/06 ,  H04B10/14 ,  H04B10/18 ,  H04B10/26 ,  H04B10/28 ,  H04L7/08

CPC分类号： H04B10/50 ,  H04B10/07951 ,  H04B10/2513 ,  H04B10/556 ,  H04B10/616 ,  H04B10/6161 ,  H04L7/027

摘要： To enable signal position detection, frequency offset compensation, clock offset compensation, and chromatic dispersion amount estimation in a communication system based on coherent detection using an optical signal, even on a signal having a great offset in an arrival time depending on a frequency due to chromatic dispersion. An optical signal transmitting apparatus generates specific frequency band signals having power concentrated on two or more specific frequencies and transmits a signal including the specific frequency band signals. An optical signal receiving apparatus converts a received signal into a digital signal, detects positions of the specific frequency band signals from the converted digital signal, estimates frequency positions of the detected specific frequency band signals, and detects a frequency offset between an optical signal receiving apparatus and an optical signal transmitting apparatus. Moreover, the optical signal receiving apparatus detects a clock offset between the optical signal receiving apparatus and the optical signal transmitting apparatus from an interval between the estimated frequency positions of the specific frequency band signals. Furthermore, the optical signal receiving apparatus estimates temporal positions of the detected specific frequency band signals and detects a chromatic dispersion amount from a difference between the temporal positions of the specific frequency band signals corresponding to different frequencies.

摘要翻译： 基于使用光学信号相干检测使得能够在通信系统中信号的位置检测，频率偏移补偿，时钟偏移补偿，而色散量估计，即使在信号具有大的到达时间偏移依赖于频率由于 色散。 一种光信号发送装置基因率具有功率的特定频带的信号集中在两个或更多个特定频率，并发送一个信号包括特定频带信号。 的光信号接收装置接收到的信号转换成数字信号转换，检测从转换后的数字信号的特定频带信号的位置，估计检测到的特定频带信号的频率位置，并检测频率在光信号接收装置之间的偏移 和光信号发送装置。 更完了，光信号接收装置检测一个时钟光信号接收装置，并从所述特定频带的信号的估计的频率位置之间的间隔的光信号发送装置之间的时间偏移。 进一步地，光信号接收装置估计检测到的特定频带信号的时间位置和色散从特定频带信号对应于不同频率的时间位置之间的差来检测量。

公开(公告)号：EP4247110A2

公开(公告)日：2023-09-20

申请号：EP23190528.2

申请日：2016-08-15

申请人： Nippon Telegraph And Telephone Corporation

发明人： KUDO, Riichi ,  ABEYSEKERA, Hirantha Sithira ,  MATSUI, Munehiro ,  SHINOHARA, Shoko ,  TAKATORI, Yasushi ,  ICHIKAWA, Takeo ,  MIZOGUCHI, Masato

IPC分类号： H04W84/12

摘要： Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.

公开(公告)号：EP4216454A1

公开(公告)日：2023-07-26

申请号：EP23162696.1

申请日：2013-02-04

申请人： Nippon Telegraph And Telephone Corporation

发明人： MURAKAMI, Tomoki ,  ASAI, Yusuke ,  KUDO, Riichi ,  ISHIHARA, Koichi ,  MIZOGUCHI, Masato ,  ICHIKAWA, Takeo

IPC分类号： H04B7/06 ,  H04L5/00 ,  H04L27/26 ,  H04W16/28

摘要： Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.

公开(公告)号：EP3176964B1

公开(公告)日：2018-03-28

申请号：EP16204161.0

申请日：2014-01-15

申请人： Nippon Telegraph And Telephone Corporation

发明人： ISHIHARA, Koichi ,  MIZOGUCHI, Masato ,  MURAKAMI, Tomoki ,  KATAOKA, Tomoyoshi ,  KISAKA, Yoshiaki ,  NAKAGAWA, Tadao ,  YAMAZAKI, Etsushi ,  OKAMOTO, Seiji ,  HORIKOSHI, Kengo ,  TOMIZAWA, Masahito ,  KUDO, Riichi

IPC分类号： H04B10/25 ,  H04B10/077 ,  H04B10/69 ,  H04J14/08

CPC分类号： H04J14/08 ,  H04B10/0775 ,  H04B10/2513 ,  H04B10/25133 ,  H04B10/516 ,  H04B10/61 ,  H04B10/6161 ,  H04B10/697 ,  H04B2210/072 ,  H04J3/14

摘要： The estimation of an amount of chromatic dispersion using a training signal sequence is possible. A transmission method includes: a training signal sequence generation step of generating, as training signal sequences, a plurality of signal sequences having power concentrated in a plurality of frequency bands, the power concentrated at different frequency bands; a training signal sequence selection step of selecting at least one training signal sequence from among the plurality of training signal sequences generated in the training signal sequence generation step, a signal multiplexing step of generating a signal sequence obtained by time-division multiplexing the training signal sequence selected in the training signal sequence selection step with a transmission data sequence, and an electrical-to-optical conversion step of transmitting the signal sequence generated in the signal multiplexing step as an optical signal.

公开(公告)号：EP4373003A3

公开(公告)日：2024-07-10

申请号：EP24167485.2

申请日：2016-02-23

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： SHINOHARA, Shoko ,  INOUE, Yasuhiko ,  KISHIDA, Akira ,  KUDO, Riichi ,  MIZOGUCHI, Masato

IPC分类号： H04W72/0446 ,  H04W74/0816 ,  H04W74/00 ,  H04W84/12

CPC分类号： H04W84/12 ,  H04B7/0452 ,  H04W74/002 ,  H04W74/0816 ,  H04W72/0446

摘要： A wireless LAN access point, AP, to which a plurality of wireless LAN stations, STAs, are connected and a wireless frame is simultaneously transmitted from each of the plurality of STAs to the AP in a multiple access schemes, comprises a station information collection unit configured to collect from the plurality of STAs station information which is used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, said station information collection unit being configured to collect propagation characteristic information of the STA as the station information; a simultaneous transmission determination unit configured to select a combination of STAs performing the simultaneous transmission based on the station information, a trigger transmission unit configured to transmit to each of the STAs performing the simultaneous transmission a trigger frame which instructs to perform the simultaneous transmission and which includes information necessary for the control of the simultaneous transmission, a first CSMA/CA control unit that acquires a channel access right for transmitting a downlink data frame from the AP to each of the STAs, a second CSMA/CA control unit that acquires a channel access right for transmitting the trigger frame, and an access control unit that sets a parameter of CSMA/CA control performing priority control between the CSMA/CA control on the downlink data frame and the CSMA/CA control on the trigger frame.

公开(公告)号：EP3547565B1

公开(公告)日：2020-11-04

申请号：EP19153099.7

申请日：2013-02-04

申请人： Nippon Telegraph and Telephone Corporation

发明人： MURAKAMI, Tomoki ,  ASAI, Yusuke ,  KUDO, Riichi ,  ISHIHARA, Koichi ,  MIZOGUCHI, Masato ,  ICHIKAWA, Takeo

IPC分类号： H04B7/06 ,  H04B7/10 ,  H04J11/00 ,  H04L5/00 ,  H04L27/26 ,  H04W16/28 ,  H04W28/16